Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbee99b8eef6300a…

MALICIOUS

PDF

66.3 KB Created: 2021-02-26 10:05:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 5bde1ecd378ded9950aace2bcde96dec SHA-1: 38b35d0f12346a5b8f3f01d4be079ff76fbf0296 SHA-256: bbee99b8eef6300ac6d16daea2bb6619751c3e46ee8559f3187a0e110501b1e6
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links designed to redirect users to external websites, identified as a link farm. One critical heuristic indicates the PDF links to known malicious redirector infrastructure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://crophysi.ru/wix?keyword=tv+guide+decatur+il In PDF document text
    • https://cdn.sqhk.co/pewowutefiw/bShcieQ/smart_pulse_survey_5._6_version_download.pdfIn PDF document text
    • https://lovalizivida.weebly.com/uploads/1/3/5/9/135990258/zepewosedotusebuje.pdfIn PDF document text
    • https://cdn.sqhk.co/bamazaludez/uD6hjMN/38457665732.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403271/normal_5fc7e15098a04.pdfIn PDF document text
    • https://cdn.sqhk.co/somupojebif/eAnwh9p/solurimojoxalukeramogas.pdfIn PDF document text
    • https://cdn.sqhk.co/ragonujip/ihEfOFw/star_wars_galaxy_of_heroes_characters_to_farm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484156/normal_5fd3dcd44860c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389599/normal_5ff31037e3e8f.pdfIn PDF document text
    • https://fewegako.weebly.com/uploads/1/3/1/4/131453302/funegapev-vusakuxafupedu-voveko.pdfIn PDF document text
    • https://cdn.sqhk.co/bulelovuroga/DjbjKjj/super_slime_sam_nuevos_videos_en_espanol_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392649/normal_600a1502b4d63.pdfIn PDF document text
    • https://cdn.sqhk.co/juwafajem/fricHhf/terraforming_mars_expansion_board_game_geek.pdfIn PDF document text
    • https://cdn.sqhk.co/vakujediraw/hgXTFsB/monkey_touch_experiment.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvinudubuno/fWHdjik/car_tax_calculator_california.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489061/normal_5fccab2bc615b.pdfIn PDF document text
    • https://bodarisijusafu.weebly.com/uploads/1/3/5/3/135383154/8529252.pdfIn PDF document text
    • https://cdn.sqhk.co/wojusipi/hgdggQC/petroleum_engineering_salary_texas.pdfIn PDF document text
    • https://cdn.sqhk.co/wujamufaw/Oliadjj/earth_asteroid_impact_extinction.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA9E 4936 bytes
SHA-256: ef7107e529a4be33a6c7b186836086ce19faeaab26e47aaaddb2f074d42f7390
font_01_sfnt_off0000db81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB81 9536 bytes
SHA-256: 34b0c5c16ffdc79e8704fa2fc28e922fd9ec7b61a227f4aa944935efb5dbdc77

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